Here's what rhymes with cogniac.
back lack pack nach rack sac sack hack jack tack fac knack lac shack mac mak tak whack wrack yak mack wack yack black attack track cardiac crack stack plaque slack aback smack snack flak maniac quack unpack clack claque flack repack anorak gunnysack almanac elegiac shellac zodiac ipecac crackerjack thumbtack highjack mudpack skyjack demoniac hardtack piggyback amnesiac insomniac rickrack pickaback paperback counterattack quarterback haversack lumberjack applejack razorback stickleback steeplejack megalomaniac nymphomaniac Words that almost rhyme with cogniac
bag lag tag rag gag hag wag fag mag nag sag zag dag shag flag drag slag stag brag crag snag swag blag toerag dishrag fleabag scrag washrag nosebag chinwag scallywag wigwag sleazebag lollygag lallygag saddlebag scalawag bank task rank tank thank mask sank cask masque shank bask dank hanc lank talc hank yank basque blank drank flank flask frank crank plank shrank franc prank clank spank stank unmask swank embank antitank outrank charabanc riverbank databank pointblank